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jquery submit form with button on event change

when a checkbox is checked, i want the form to submit. However I need parameters contained in my submit button to be part of the request.
This bit of script submits the form but not using the button. I guess because jquery submits it some other way.
$(e.target).find("input[type='radio']").attr("checked", true)
$(".edit_booking").submit()
I've tried pointing jquery to the button containing the params via it's ID and using a click event, but this doesn't work either.
$(e.target).find("input[type='radio']").attr("checked", true)
$("#bookings_next").click()
Bits of the form:
<form novalidate="novalidate" class="simple_form edit_booking" id="edit_booking_9486" action="/venues/plymouth/bookings/9486" accept-charset="UTF-8" method="post">
.............
<input type="submit" name="forward_button" value="Next step" id="bookings_next" />
Many thanks

aha, simple!
$('#bookings_next').trigger('click');
I have to trigger the event.

How to turn off form validation in Angular when clicking by button that shoulden't send form

I have a form like this one:
<form name="myForm">
<input id="myName" ng-model="myName" required/>
...
<button ng-click="doSomePrepare()">Do some prepare</button>
...
<button ng-click="saveForm()" ng-disabled="myForm.$invalid">Save</button>
</form>
I want validate form only when "Save" button clicked.
But if I'm click "Do some prepare", browser(chrome) ask me to fill "myName" input.
It's make me problems, cause in real world "Do some prepare" button may be a datepicker button or a dropdown or somethig like that.
P.S. I'm use Angular 1.2 version, but as far as I know this can be reprodused with version 1.0
JSfiddle: http://jsfiddle.net/se_panfilov/wQF4S/4/

Make your first button a non-form-submitting button:
<button type="button" ng-click="doSomePrepare()">Do some prepare</button>
You can test it here

The default type attribute of a button tag is submit. Try setting the type to reset or to button to prevent the submit event from firing when you click it.
Working demo: http://jsfiddle.net/wQF4S/3/

Onclick shouldn't trigger form data submission

I just found out that every time onclick event for my <button> placed inside <form> tag triggers, form submits it's data as if i clicked <input type='submit'>.
I don't want that. Buttons inside my form serve other task, form shouldn't submit data after i clicked one of them.
To be more clear, i want this code:
<form action="http://www.google.com" method="POST">
<button onclick="alert('hi!')">Button</button>
<br>
<input type="submit" value="submit"/>
</form>
to show alert "hi!" when i click on the Button and it shouldn't open Google after that. It should only show Google when i press "submit".

Specify type="button":
<button type="button" onclick="alert('hi!')">Button</button>
From the linked article:
This [submit] is the default if the attribute is not specified

Try this..
onclick="alert('hi!'); return false;"

With jQuery use a span rather than an input, put use the .button call and then set a click event.

Clicking submit button of an HTML form by a Javascript code

I don't know much about WEB probramming, so feel free to ask if I'm missing any details.
There is a certain website which I'm visiting very frequently, and it requires users to log in every time they visit. For the login page of this website, I'm trying to write down a userscript which will automatically log me in.
I managed to fill in the form fields, but don't have any idea how to click the submit button by JavaScript. The below is a condensed version of the original login code. How can I automatically click this submit button in this code?
<div id="start">
<div id="header">
<div id="login">
<form id="loginForm" name="loginForm" method="post" action="#">
// ...
<input type="submit" id="loginSubmit" onclick="changeAction('submitInput','loginForm');document.forms['loginForm'].submit();" value="Log in" />
// ...
</form>
</div>
</div>
</div>

The usual way to submit a form in general is to call submit() on the form itself, as described in krtek's answer.
However, if you need to actually click a submit button for some reason (your code depends on the submit button's name/value being posted or something), you can click on the submit button itself like this:
document.getElementById('loginSubmit').click();

document.getElementById('loginSubmit').submit();
or, use the same code as the onclick handler:
changeAction('submitInput','loginForm');
document.forms['loginForm'].submit();
(Though that onclick handler is kind of stupidly-written: document.forms['loginForm'] could be replaced with this.)

You can do :
document.forms["loginForm"].submit()
But this won't call the onclick action of your button, so you will need to call it by hand.
Be aware that you must use the name of your form and not the id to access it.

Posting a form with hidden fields without submit button click

I have a form as
<form action="" method="post">
<input name="Descripcion" type="hidden" value="" id="Descripcion" runat="server" />
<input id="Submit1" type="submit" value="Comprar" />
Instead of clicking on submit button i want that the form should be posted without clicking submit button with hidden fields

You can submit an html form from javascript by calling the form's .submit() method. e.g.:
document.getElementById('myform').submit();
Of course, you still need an action in your example so the form has somewhere to submit itself to. Also, you tagged your question asp.net. If this is a webforms page you should use the default form rather then adding your own form to the html markup. You submit the asp.net form by calling the __doPostBack() method.

you can build and submit a form with javascript you can call from other events or when loading a page
myform=document.createElement('form');
myform.method='post';
myform.target='_top';
myform.action='';
input1=document.createElement('input');
input1.type='hidden';
input1.name='Descripcion';
input1.value='';
myform.appendChild(input1);
document.appendChild(myform);
myform.submit();

You can also accomplish the same using jQuery:
$('myform').submit();